Since patch #2, the store inventory is completely unusable with a mouse. Moving the cursor over the list causing the list to scroll and it's essentially impossible to select anything from the list at all. It's a if it is treating the position of the mouse cursor in relation to the centre of the list as an input to scroll the list, so if your cursor is slightly below the mid point it will scroll downwards.

After reading through your bug reports, it seems that you are experiencing very unusual behavior with some of the features. Could I ask you to run a Game Cache Integrity check please just to make sure you are not playing with a mingle of new files with certain old files.

Let us know if this still occurs once you've done the Cache Integrity check!